=== Hocon Configuration Format

The Hocon Configuration Format extends the Vert.x Configuration Retriever and provides the
support for the HOCON(https://github.com/typesafehub/config/blob/master/HOCON.md) format.

It supports includes, json, properties, macros...

==== Using the Hocon Configuration Format

To use the Hocon Configuration Format, add the following dependency to the
_dependencies_ section of your build descriptor:

* Maven (in your `pom.xml`):

[source,xml,subs="+attributes"]
----
<dependency>
  <groupId>io.vertx</groupId>
  <artifactId>vertx-config-hocon</artifactId>
  <version>3.4.1</version>
</dependency>
<dependency>
  <groupId>io.vertx</groupId>
  <artifactId>vertx-config</artifactId>
  <version>3.4.1</version>
</dependency>
----

* Gradle (in your `build.gradle` file):

[source,groovy,subs="+attributes"]
----
compile 'io.vertx:vertx-config:3.4.1'
compile 'io.vertx:vertx-config-hocon:3.4.1'
----

==== Configuring the store to use HOCON

Once added to your classpath or dependencies, you need to configure the
`link:../../apidocs/io/vertx/config/ConfigRetriever.html[ConfigRetriever]` to use this format:

[source, kotlin]
----
var store = ConfigStoreOptions(
  type = "file",
  format = "hocon",
  config = json {
    obj("path" to "my-config.conf")
  })

var retriever = ConfigRetriever.create(vertx, ConfigRetrieverOptions(
  stores = listOf(store)))

----

You just need to set `format` to `hocon`.